The Association for Systematic Philosophy was a moderated discussion group in the 90's which, although small – it never had more than about a dozen active participants – ended up having quite a few members who went on to achieve interesting things.
The member who became the most famous was Jimmy Wales, co-founder of Wikipedia and once listed as one of Time magazine's 100 most influential people of the year.
The creator of ASP, and the moderator at the time I joined, was Larry Sanger, the other co-founder of Wikipedia.
Soon after, Ben Kovitz became moderator. It was he who first told Sanger about wikis.
In addition, there was the economist Bryan Caplan, author of The Myth of the Rational Voter, called the best political book of its year by the New York Times, and of Selfish Reasons to Have More Kids;
philosopher Michael Huemer, author of such works as The Problem of Political Authority, Ethical Intuitionism and Skepticism and the Veil of Perception;
mathematician and child prodigy Terence Tao, winner of the Fields Medal, considered the most prestigious award in mathematics;Peter J. King, author of One Hundred Philosophers and co-author of The Philosophy Book;
and Jeremy P. Anderson, former Jeopardy! contestant, voice on Porsche commercials, and also a philosopher.
